3a^2-12a=-15

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Solution for 3a^2-12a=-15 equation:


Simplifying
3a2 + -12a = -15

Reorder the terms:
-12a + 3a2 = -15

Solving
-12a + 3a2 = -15

Solving for variable 'a'.

Reorder the terms:
15 + -12a + 3a2 = -15 + 15

Combine like terms: -15 + 15 = 0
15 + -12a + 3a2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(5 + -4a + a2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(5 + -4a + a2)' equal to zero and attempt to solve: Simplifying 5 + -4a + a2 = 0 Solving 5 + -4a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + -4a + -5 + a2 = 0 + -5 Reorder the terms: 5 + -5 + -4a + a2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4a + a2 = 0 + -5 -4a + a2 = 0 + -5 Combine like terms: 0 + -5 = -5 -4a + a2 = -5 The a term is -4a. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4a + 4 + a2 = -5 + 4 Reorder the terms: 4 + -4a + a2 = -5 + 4 Combine like terms: -5 + 4 = -1 4 + -4a + a2 = -1 Factor a perfect square on the left side: (a + -2)(a + -2) = -1 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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